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Table 2 <br /> HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS <br /> February 1990 Through June 2004 <br /> Former 76 Station 6981 <br /> Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Continents <br /> Sampled Elevation Water Thickness water in 8260B benzene Xylenes 802113 8260B <br /> Elevation Elevation <br /> (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg/1) (µg/1) (µg11) (µg/1) (µg/1) (µg/1) <br /> MW-1 (Screen Interval in feet 510-55 0) <br /> 10/18/90 -- -- -- -. ._ Dry <br /> 11/19/90 -- -- -- __ ._ <br /> -- -- -- -- -- -- -- -- Dry <br /> 12/27/90 -- -- -- -- -- _- Dry <br /> 01/28/91 -- -- -- __ Dry <br /> 04/02/91 -- -- -- _. Dry <br /> 07/18/91 -- -- -- .. __ __ Dry <br /> 09/30/91 -- -- -- __ Dry <br /> 11/14/91 -- -- -- -- -- Dry <br /> 04/16/92 -- -- -- __ Dry <br /> 07/30/92 -- -- -. .. Dry <br /> 10/21/92 -- -- -- -- -- -- -- -- -- -- -- Dry <br /> 01/13/93 - -- _. __ .. __ __ _ __ __ __ Dry <br /> 04/26/93 1041 49 12 000 -3871 -- 1400 -- 16 ND<5 0 ND<5 0 ND<5 0 -- -- <br /> 07/26/93 1041 50 13 000 -3972 -101 550 -- 12 9 5 ND<1 0 7 5 -- <br /> 10/20/93 1041 5065 000 -4024 -052 440 -- 05 099 ND<0 5 21 -- -- <br /> 01/17/94 1041 48 18 000 -3777 247 990 -- 15 10 39 150 -- <br /> 04/25/94 1041 46 10 000 -3569 -- 180 -- 2 1 1 7 ND<0 5 15 -- -- <br /> 07/25/94 1041 4845 000 -38 04 -235 ND<50 __ ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- <br /> 10/26/94 1041 4966 000 -3925 -121 68 -- 4 ND<0 5 ND<0 5 ND<0 5 --01/25/95 1041 4728 000 -3687 238 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- <br /> 04/26/95 1041 4232 000 -3191 496 ND<50 -- ND<0 5 064 ND<0 5 075 -- <br /> 07/26/95 1041 4335 000 -3294 -103 ND<50 -- ND<0 5 064 ND<0 5 0 84 -- -- <br /> 10/25/95 1041 44 23 000 -33 82 -088 .- <br /> 01/24/96 1041 4141 000 -31 00 2 82 ND<250 -- ND<2 5 ND<2 5 ND<2 5 ND<2 5 -- -- <br /> 04/25/96 1041 3675 000 -2634 -- -- -- -- -- <br /> 6984 Page 1 of 28 <br />